confidence coefficient


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coefficient

 [ko″ĕ-fish´ent]
1. an expression of the change or effect produced by the variation in certain variables, or of the ratio between two different quantities.
2. in chemistry, a number or figure put before a chemical formula to indicate how many times the formula is to be multiplied.
Bunsen coefficient the number of milliliters of gas dissolved in a milliliter of liquid at atmospheric pressure (760 mm Hg) and a specified temperature. Symbol, α.
confidence coefficient the probability that a confidence interval will contain the true value of the population parameter. For example, if the confidence coefficient is 0.95, 95 per cent of the confidence intervals so calculated for a large number of random samples would contain the parameter.
correlation coefficient a numerical value that indicates the degree and direction of relationship between two variables; the coefficients range in value from +1.00 (perfect positive relationship) to 0.00 (no relationship) to −1.00 (perfect negative or inverse relationship).
diffusion coefficient see diffusion coefficient.
coefficient of digestibility the proportion of a food that is digested compared to what is absorbed, expressed as a percentage.
dilution coefficient a number that expresses the effectiveness of a disinfectant for a given organism. It is calculated by the equation tcn = k, where t is the time required for killing all organisms, c is the concentration of disinfectant, n is the dilution coefficient, and k is a constant. A low coefficient indicates the disinfectant is effective at a low concentration.
linear absorption coefficient the fraction of a beam of radiation absorbed per unit thickness of absorber.
mass absorption coefficient the linear absorption coefficient divided by the density of the absorber.
phenol coefficient see phenol coefficient.
sedimentation coefficient the velocity at which a particle sediments in a centrifuge divided by the applied centrifugal field, the result having units of time (velocity divided by acceleration), usually expressed in Svedberg units (S), which equal 10−13 second. Sedimentation coefficients are used to characterize the size of macromolecules; they increase with increasing mass and density and are higher for globular than for fibrous particles.

con·fi·dence co·ef·fi·cient

(konfi-dĕns kōĕ-fishĕnt)
Degree of certainty with which one can state an estimated statistical range is correct. Also called confidence level.
References in periodicals archive ?
In addition, it is very important to gain the confidence coefficient objectively.
Basically, there are two influencing factors: (1) uncertainties of values of evaluation index and attribute measure and (2) different confidence coefficients.
The confidence coefficient with [gamma] = 0.95 is defined and fuzzy random variables from normal distribution are generated by using MATLAB [28].
Considering a fuzzy confidence interval at a-cut which gives the coverage probability higher than 0.9464 at significant level 95% will be the coverage probability that is covered in the expected confidence coefficient. Then only the coverage probability that is covered in the expected confidence coefficient will be used in the most appropriate expected length estimation.
In Figure 7(a), it is seen that at the sample size n = 30,50 (n < 100) there are some a-cut that give lower coverage probability covering in the expected confidence coefficient when [??]P [greater than or equal to] 0.9464.
Simulation results of a problem of diagnosis are shown in Figure 4,which presents time diagrams for the confidence coefficients formed with the use of a bank of two independent observers adjusted for nominal and faulty states, respectively.
As a result, the confidence coefficients (denoted by [K.sub.ij]) calculated in this algorithm according to the rule from the previous section correspond to the transitions [S.sub.i] [right arrow] [S.sub.j] between technical states, rather than technical states themselves.
In order to make a decision according to rule (2), we need to determine the confidence coefficients [K.sub.i], (i = [bar.0, N]) for the technical
[ET.sub.0] values obtained by the different methods, in relation to the FAO-PM method, were compared using Willmott's index of agreement (Willmott et al., 1985), correlation and confidence coefficients (Camargo & Sentelhas, 1997) and root-mean-square error, according to Eqs.
Determining confidence coefficient for uneven surfaces.
Confidence coefficient is defined as mobilized medium cut stress ratio in slip surface on the average created cut stresses along slip surface.
Based on the effects of design parameters for stability it could be concluded that the angle of inner friction and adhesion coefficient have a direct relationship with the confidence coefficient while the specific weight (weight density) of the materials has an inverse relationship with stability.